51389448 has 64 divisors (see below), whose sum is σ = 143968320. Its totient is φ = 15148800.

The previous prime is 51389431. The next prime is 51389483. The reversal of 51389448 is 84498315.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7138 + ... + 12398.

It is an arithmetic number, because the mean of its divisors is an integer number (2249505).

Almost surely, 2^51389448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51389448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71984160).

51389448 is an abundant number, since it is smaller than the sum of its proper divisors (92578872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51389448 is a wasteful number, since it uses less digits than its factorization.

51389448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318 (or 5314 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 51389448 is about 7168.6433863040. The cubic root of 51389448 is about 371.7845324081.

The spelling of 51389448 in words is "fifty-one million, three hundred eighty-nine thousand, four hundred forty-eight".